/**
 * Copyright 2018 LinkedIn Corp. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 */

package com.github.ambry.store;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;


/**
 * No-op StoreKeyConverter. StoreKeys get paired with themselves
 */
class StoreKeyConverterImplNoOp implements StoreKeyConverter {

  @Override
  public Map<StoreKey, StoreKey> convert(Collection<? extends StoreKey> input) throws Exception {
    Map<StoreKey, StoreKey> output = new HashMap<>();
    if (input != null) {
      input.forEach((storeKey) -> output.put(storeKey, storeKey));
    }
    return output;
  }

  @Override
  public StoreKey getConverted(StoreKey storeKey) {
    return storeKey;
  }

  @Override
  public void dropCache() {
    //no-op
  }
}
